Abstract
We investigate the similarities and differences in the processes of static and cyclic corrosion cracking of alloys. It is shown that the threshold amplitude of the stress intensity factor of cyclic corrosion cracking ΔK Iscfc can serve as a basic characteristic of materials that are not susceptible to static corrosion cracking in the environments under investigation. Structural alloys susceptible to cyclic corrosion cracking have two basic characteristicsK Iscc and ΔK Iscfc with different natures. As an exception, the values of these characteristics coincide for high-strength alloys. We suggest a model for description of the influence of environment on the fatigue-crack growth rate in alloys according to the mechanisms of hydrogen embrittlement and anodic dissolution of a metal at the crack tip as well as a procedure for its practical implementation. We justify the analysis by evaluation of the parameter ΔK Iscfc for both scientific researche and engineering practice (in particular, for estimation of the service life of structural members).
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Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, L'viv. Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 30, No. 6, pp. 7–24, November – December, 1994.
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Gnyp, I.P., Pokhmurs'kyi, V.I. On the use of the concept of cyclic corrosion-cracking threshold as a basic characteristic of structural materials in the mechanics of corrosion fracture. Mater Sci 30, 621–635 (1995). https://doi.org/10.1007/BF00558898
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DOI: https://doi.org/10.1007/BF00558898